Seattle Public Utilities Mami Hara, General Manager/CEO

Raw Water Intake System

  • Intake pipes draw water from Lake Youngs.
  • Lake Youngs.

Lake Youngs serves as a reservoir for Cedar River water prior to its treatment. Like the watershed, access to Lake Youngs is protected, minimizing the opportunity for introducing contaminates. Water quality within the lake can vary due to seasonal changes, such as algae growth and temperature stratification within the lake. To ensure that the best quality water is drawn from the lake, the raw water intake and pump station is located 400 feet offshore in water that is approximately 50 feet deep. In addition, the pump station has three inlet gates so water can be drawn at different depths to optimize water quality and treatment.